A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A . The magnetic field at the centre of the solenoid is: μ 0 = 4 π × 10 − 7 T m A − 1

Question

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A . The magnetic field at the centre of the solenoid is: μ 0 = 4 π × 10 − 7 T m A − 1, 3.14 × 10 – 4 T, 6.28 × 10 – 5 T, 3.14 × 10 – 5 T, 6.28 × 10 – 4 T

MARKS App · Accepted Answer

The magnetic field at the centre of the solenoid is given by, B = μ 0 n i Where n is the number of turns per unit length ⇒ B = 4 π × 10 - 7 × 100 ( 0 . 5 ) × 2 . 5 ⇒ B = 6 . 28 × 10 - 4 T

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